export default `

export function assertPath(path) {
	if (typeof path !== 'string') {
		throw new TypeError('Path must be a string. Received ' + JSON.stringify(path))
	}
}

// Resolves . and .. elements in a path with directory names
export function normalizeStringPosix(path, allowAboveRoot) {
	var res = ''
	var lastSegmentLength = 0
	var lastSlash = -1
	var dots = 0
	var code
	for (var i = 0; i <= path.length; ++i) {
		if (i < path.length) code = path.charCodeAt(i)
		else if (code === 47 /*/*/) break
		else code = 47 /*/*/
		if (code === 47 /*/*/) {
			if (lastSlash === i - 1 || dots === 1) {
				// NOOP
			} else if (lastSlash !== i - 1 && dots === 2) {
				if (
					res.length < 2 ||
					lastSegmentLength !== 2 ||
					res.charCodeAt(res.length - 1) !== 46 /*.*/ ||
					res.charCodeAt(res.length - 2) !== 46 /*.*/
				) {
					if (res.length > 2) {
						var lastSlashIndex = res.lastIndexOf('/')
						if (lastSlashIndex !== res.length - 1) {
							if (lastSlashIndex === -1) {
								res = ''
								lastSegmentLength = 0
							} else {
								res = res.slice(0, lastSlashIndex)
								lastSegmentLength = res.length - 1 - res.lastIndexOf('/')
							}
							lastSlash = i
							dots = 0
							continue
						}
					} else if (res.length === 2 || res.length === 1) {
						res = ''
						lastSegmentLength = 0
						lastSlash = i
						dots = 0
						continue
					}
				}
				if (allowAboveRoot) {
					if (res.length > 0) res += '/..'
					else res = '..'
					lastSegmentLength = 2
				}
			} else {
				if (res.length > 0) res += '/' + path.slice(lastSlash + 1, i)
				else res = path.slice(lastSlash + 1, i)
				lastSegmentLength = i - lastSlash - 1
			}
			lastSlash = i
			dots = 0
		} else if (code === 46 /*.*/ && dots !== -1) {
			++dots
		} else {
			dots = -1
		}
	}
	return res
}

function _format(sep, pathObject) {
	var dir = pathObject.dir || pathObject.root
	var base = pathObject.base || (pathObject.name || '') + (pathObject.ext || '')
	if (!dir) {
		return base
	}
	if (dir === pathObject.root) {
		return dir + base
	}
	return dir + sep + base
}

// path.resolve([from ...], to)
export const resolve = function resolve() {
	var resolvedPath = ''
	var resolvedAbsolute = false
	var cwd

	for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
		var path
		if (i >= 0) path = arguments[i]
		else {
			if (cwd === undefined) cwd = process.cwd()
			path = cwd
		}

		assertPath(path)

		// Skip empty entries
		if (path.length === 0) {
			continue
		}

		resolvedPath = path + '/' + resolvedPath
		resolvedAbsolute = path.charCodeAt(0) === 47 /*/*/
	}

	// At this point the path should be resolved to a full absolute path, but
	// handle relative paths to be safe (might happen when process.cwd() fails)

	// Normalize the path
	resolvedPath = normalizeStringPosix(resolvedPath, !resolvedAbsolute)

	if (resolvedAbsolute) {
		if (resolvedPath.length > 0) return '/' + resolvedPath
		else return '/'
	} else if (resolvedPath.length > 0) {
		return resolvedPath
	} else {
		return '.'
	}
}

export const normalize = function normalize(path) {
	assertPath(path)

	if (path.length === 0) return '.'

	var isAbsolute = path.charCodeAt(0) === 47 /*/*/
	var trailingSeparator = path.charCodeAt(path.length - 1) === 47 /*/*/

	// Normalize the path
	path = normalizeStringPosix(path, !isAbsolute)

	if (path.length === 0 && !isAbsolute) path = '.'
	if (path.length > 0 && trailingSeparator) path += '/'

	if (isAbsolute) return '/' + path
	return path
}

export const isAbsolute = function isAbsolute(path) {
	assertPath(path)
	return path.length > 0 && path.charCodeAt(0) === 47 /*/*/
}

export const join = function join() {
	if (arguments.length === 0) return '.'
	var joined
	for (var i = 0; i < arguments.length; ++i) {
		var arg = arguments[i]
		assertPath(arg)
		if (arg.length > 0) {
			if (joined === undefined) joined = arg
			else joined += '/' + arg
		}
	}
	if (joined === undefined) return '.'
	return normalize(joined)
}

export const relative = function relative(from, to) {
	assertPath(from)
	assertPath(to)

	if (from === to) return ''

	from = resolve(from)
	to = resolve(to)

	if (from === to) return ''

	// Trim any leading backslashes
	var fromStart = 1
	for (; fromStart < from.length; ++fromStart) {
		if (from.charCodeAt(fromStart) !== 47 /*/*/) break
	}
	var fromEnd = from.length
	var fromLen = fromEnd - fromStart

	// Trim any leading backslashes
	var toStart = 1
	for (; toStart < to.length; ++toStart) {
		if (to.charCodeAt(toStart) !== 47 /*/*/) break
	}
	var toEnd = to.length
	var toLen = toEnd - toStart

	// Compare paths to find the longest common path from root
	var length = fromLen < toLen ? fromLen : toLen
	var lastCommonSep = -1
	var i = 0
	for (; i <= length; ++i) {
		if (i === length) {
			if (toLen > length) {
				if (to.charCodeAt(toStart + i) === 47 /*/*/) {
					// We get here if \`from\` is the exact base path for \`to\`.
					// For example: from='/foo/bar'; to='/foo/bar/baz'
					return to.slice(toStart + i + 1)
				} else if (i === 0) {
					// We get here if \`from\` is the root
					// For example: from='/'; to='/foo'
					return to.slice(toStart + i)
				}
			} else if (fromLen > length) {
				if (from.charCodeAt(fromStart + i) === 47 /*/*/) {
					// We get here if \`to\` is the exact base path for \`from\`.
					// For example: from='/foo/bar/baz'; to='/foo/bar'
					lastCommonSep = i
				} else if (i === 0) {
					// We get here if \`to\` is the root.
					// For example: from='/foo'; to='/'
					lastCommonSep = 0
				}
			}
			break
		}
		var fromCode = from.charCodeAt(fromStart + i)
		var toCode = to.charCodeAt(toStart + i)
		if (fromCode !== toCode) break
		else if (fromCode === 47 /*/*/) lastCommonSep = i
	}

	var out = ''
	// Generate the relative path based on the path difference between \`to\`
	// and \`from\`
	for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) {
		if (i === fromEnd || from.charCodeAt(i) === 47 /*/*/) {
			if (out.length === 0) out += '..'
			else out += '/..'
		}
	}

	// Lastly, append the rest of the destination (\`to\`) path that comes after
	// the common path parts
	if (out.length > 0) return out + to.slice(toStart + lastCommonSep)
	else {
		toStart += lastCommonSep
		if (to.charCodeAt(toStart) === 47 /*/*/) ++toStart
		return to.slice(toStart)
	}
}

export const _makeLong = function _makeLong(path) {
	return path
}

export const dirname = function dirname(path) {
	assertPath(path)
	if (path.length === 0) return '.'
	var code = path.charCodeAt(0)
	var hasRoot = code === 47 /*/*/
	var end = -1
	var matchedSlash = true
	for (var i = path.length - 1; i >= 1; --i) {
		code = path.charCodeAt(i)
		if (code === 47 /*/*/) {
			if (!matchedSlash) {
				end = i
				break
			}
		} else {
			// We saw the first non-path separator
			matchedSlash = false
		}
	}

	if (end === -1) return hasRoot ? '/' : '.'
	if (hasRoot && end === 1) return '//'
	return path.slice(0, end)
}

export const basename = function basename(path, ext) {
	if (ext !== undefined && typeof ext !== 'string') throw new TypeError('"ext" argument must be a string')
	assertPath(path)

	var start = 0
	var end = -1
	var matchedSlash = true
	var i

	if (ext !== undefined && ext.length > 0 && ext.length <= path.length) {
		if (ext.length === path.length && ext === path) return ''
		var extIdx = ext.length - 1
		var firstNonSlashEnd = -1
		for (i = path.length - 1; i >= 0; --i) {
			var code = path.charCodeAt(i)
			if (code === 47 /*/*/) {
				// If we reached a path separator that was not part of a set of path
				// separators at the end of the string, stop now
				if (!matchedSlash) {
					start = i + 1
					break
				}
			} else {
				if (firstNonSlashEnd === -1) {
					// We saw the first non-path separator, remember this index in case
					// we need it if the extension ends up not matching
					matchedSlash = false
					firstNonSlashEnd = i + 1
				}
				if (extIdx >= 0) {
					// Try to match the explicit extension
					if (code === ext.charCodeAt(extIdx)) {
						if (--extIdx === -1) {
							// We matched the extension, so mark this as the end of our path
							// component
							end = i
						}
					} else {
						// Extension does not match, so our result is the entire path
						// component
						extIdx = -1
						end = firstNonSlashEnd
					}
				}
			}
		}

		if (start === end) end = firstNonSlashEnd
		else if (end === -1) end = path.length
		return path.slice(start, end)
	} else {
		for (i = path.length - 1; i >= 0; --i) {
			if (path.charCodeAt(i) === 47 /*/*/) {
				// If we reached a path separator that was not part of a set of path
				// separators at the end of the string, stop now
				if (!matchedSlash) {
					start = i + 1
					break
				}
			} else if (end === -1) {
				// We saw the first non-path separator, mark this as the end of our
				// path component
				matchedSlash = false
				end = i + 1
			}
		}

		if (end === -1) return ''
		return path.slice(start, end)
	}
}

export const extname = function extname(path) {
	assertPath(path)
	var startDot = -1
	var startPart = 0
	var end = -1
	var matchedSlash = true
	// Track the state of characters (if any) we see before our first dot and
	// after any path separator we find
	var preDotState = 0
	for (var i = path.length - 1; i >= 0; --i) {
		var code = path.charCodeAt(i)
		if (code === 47 /*/*/) {
			// If we reached a path separator that was not part of a set of path
			// separators at the end of the string, stop now
			if (!matchedSlash) {
				startPart = i + 1
				break
			}
			continue
		}
		if (end === -1) {
			// We saw the first non-path separator, mark this as the end of our
			// extension
			matchedSlash = false
			end = i + 1
		}
		if (code === 46 /*.*/) {
			// If this is our first dot, mark it as the start of our extension
			if (startDot === -1) startDot = i
			else if (preDotState !== 1) preDotState = 1
		} else if (startDot !== -1) {
			// We saw a non-dot and non-path separator before our dot, so we should
			// have a good chance at having a non-empty extension
			preDotState = -1
		}
	}

	if (
		startDot === -1 ||
		end === -1 ||
		// We saw a non-dot character immediately before the dot
		preDotState === 0 ||
		// The (right-most) trimmed path component is exactly '..'
		(preDotState === 1 && startDot === end - 1 && startDot === startPart + 1)
	) {
		return ''
	}
	return path.slice(startDot, end)
}

export const format = function format(pathObject) {
	if (pathObject === null || typeof pathObject !== 'object') {
		throw new TypeError('The "pathObject" argument must be of type Object. Received type ' + typeof pathObject)
	}
	return _format('/', pathObject)
}

export const parse = function parse(path) {
	assertPath(path)

	var ret = { root: '', dir: '', base: '', ext: '', name: '' }
	if (path.length === 0) return ret
	var code = path.charCodeAt(0)
	var isAbsolute = code === 47 /*/*/
	var start
	if (isAbsolute) {
		ret.root = '/'
		start = 1
	} else {
		start = 0
	}
	var startDot = -1
	var startPart = 0
	var end = -1
	var matchedSlash = true
	var i = path.length - 1

	// Track the state of characters (if any) we see before our first dot and
	// after any path separator we find
	var preDotState = 0

	// Get non-dir info
	for (; i >= start; --i) {
		code = path.charCodeAt(i)
		if (code === 47 /*/*/) {
			// If we reached a path separator that was not part of a set of path
			// separators at the end of the string, stop now
			if (!matchedSlash) {
				startPart = i + 1
				break
			}
			continue
		}
		if (end === -1) {
			// We saw the first non-path separator, mark this as the end of our
			// extension
			matchedSlash = false
			end = i + 1
		}
		if (code === 46 /*.*/) {
			// If this is our first dot, mark it as the start of our extension
			if (startDot === -1) startDot = i
			else if (preDotState !== 1) preDotState = 1
		} else if (startDot !== -1) {
			// We saw a non-dot and non-path separator before our dot, so we should
			// have a good chance at having a non-empty extension
			preDotState = -1
		}
	}

	if (
		startDot === -1 ||
		end === -1 ||
		// We saw a non-dot character immediately before the dot
		preDotState === 0 ||
		// The (right-most) trimmed path component is exactly '..'
		(preDotState === 1 && startDot === end - 1 && startDot === startPart + 1)
	) {
		if (end !== -1) {
			if (startPart === 0 && isAbsolute) ret.base = ret.name = path.slice(1, end)
			else ret.base = ret.name = path.slice(startPart, end)
		}
	} else {
		if (startPart === 0 && isAbsolute) {
			ret.name = path.slice(1, startDot)
			ret.base = path.slice(1, end)
		} else {
			ret.name = path.slice(startPart, startDot)
			ret.base = path.slice(startPart, end)
		}
		ret.ext = path.slice(startDot, end)
	}

	if (startPart > 0) ret.dir = path.slice(0, startPart - 1)
	else if (isAbsolute) ret.dir = '/'

	return ret
}

export const sep = '/'
export const delimiter = ':'
export const win32 = null
export const posix = {
	parse,
	format,
	extname,
	basename,
	dirname,
	_makeLong,
	relative,
	join,
	isAbsolute,
	normalize,
	resolve,
	_format,
	normalizeStringPosix,
	assertPath,
}`
